don't take chantix if you've had a serious allergic or skin reaction to it. if you develop these stop taking chantix and see your doctor right away as some can be life-threatening. if you have a history of heart or blood vessel problems, tell your doctor if you have new or worse symptoms. get medical help right away if you have symptoms of a heart attack. use caution when driving or operating machinery. common side effects include nausea, trouble sleeping and unusual dreams. it helps to have people around you... they say, you're much bigger than this. and you are. [ male announcer ] ask your doctor if chantix is right for you. >>> welcome back to a very special edition of "starting point." it's christmas eve. i'm alina cho in new york. >> hello. i'm dana bash. thanks for joining us on this christmas eve morning. >>> we've got breaking news to tell you about. a scary situation unfolding right now in upstate new york, where s.w.a.t. teams are on the scene of a house fire in rochester. authorities say a gunman began shooting at responding firefighters with an as